Perfluorinated coatings and terracotta: An impregnation study

Youssef, Ali, Pabon, Martial, Woelflé, Emmanuel, Severac, Romain and Gilbert, Robert, G. (2008) Perfluorinated coatings and terracotta: An impregnation study. Journal of Applied Polymer Science, 110 2: 663-677. doi:10.1002/app.28702


Author Youssef, Ali
Pabon, Martial
Woelflé, Emmanuel
Severac, Romain
Gilbert, Robert, G.
Title Perfluorinated coatings and terracotta: An impregnation study
Journal name Journal of Applied Polymer Science   Check publisher's open access policy
ISSN 0021-8995
Publication date 2008-10-15
Year available 2008
Sub-type Article (original research)
DOI 10.1002/app.28702
Open Access Status
Volume 110
Issue 2
Start page 663
End page 677
Total pages 15
Editor Anne Hiltner
Eric Baer
Place of publication Hoboken, N. J., United States
Publisher John Wiley & Sons, Inc.
Language eng
Subject C1
861099 Ceramics, Glass and Industrial Mineral Products not elsewhere classified
030399 Macromolecular and Materials Chemistry not elsewhere classified
Abstract The mechanisms of penetration onto terracotta of two commercially available perfluorinated acrylates were studied: Zonyl®225, a solvent-based perfluorinated polyacrylate containing two unfluorinated acrylic or vinylic monomers; and Zonyl®329, an aqueous dispersion synthesized from comparable monomers plus a vinylic silane. Two application methods were used: by immersion of the substrate for 15 h and by multiple brush strokes, with pauses between strokes. Application effectiveness was assessed by measuring the depth of penetration into terracotta. The results of coating were examined by optical and electron microscopy, including elemental analysis. When the impregnating agent was applied by extended immersion, both solvent-based and aqueous dispersion exhibited higher penetration depths with increasing concentrations. When applied using multiple brush strokes, the solvent-based solution exhibited the same trend as that in immersion; however, the aqueous dispersion showed no penetration beyond 0.12 mm. This limited depth of penetration is shown to be a result of partial drying between brush strokes, but also as a result of porosity restrictions and electrostatic interactions between the positively charged polymer colloids in the dispersion and the negatively charged terracotta surface. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Keyword coatings
diffusion
electron microscopy
surfaces
fluoropolymers
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published Online: 9 Jul 2008

 
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Created: Wed, 15 Apr 2009, 01:00:52 EST by Emma Cushworth on behalf of School of Land, Crop and Food Sciences